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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






2. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






3. What about the sperm for a bull which has been castrated but still has testicles?






4. Days which have increasing daylight hours

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5. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






6. Days which have decreasing daylight hours

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7. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






8. Parturition is controlled by...






9. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






10. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






11. 19-23 (21) days






12. 1-2 days






13. 45-60 days after breeding; re-breed as required






14. FEED






15. Milk ~305 days - dry 60 days prior to calving






16. Look for infection - split - and rupture of the penis






17. 30-38 hours after estrus cycle begins






18. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






19. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






20. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






21. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






22. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






23. 1-3 days






24. 14-19 (17) days






25. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






26. Produce testosterone. located between the seminiferous tubules






27. 26 hours after estrus begins






28. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






29. What helps regulate spermatogenesis?






30. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






31. Superior genes are _______ to multiply






32. What helps regulate spermatogenesis?






33. Luteolysis happens because of the ____________ hormone






34. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






35. 19-23 (21) days






36. Produce testosterone. located between the seminiferous tubules






37. Failure to have one testis (gonad) to descend






38. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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39. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






40. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






41. 336 days






42. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






43. Check feet and legs - look for masculine traits in build such as crest and muscling






44. (FSH) causes egg to mature in females






45. Why Dairy calves are fed powdered milk.






46. 19-23 (21) days






47. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






48. To remove/separate testicles from animal's body before animal reaches puberty






49. Sperm production






50. Male on one pin and female on other side